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.NET MAUI + GitHub Actions + Commas in Certificate Names

Mitchel Sellers

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Apple issues certificates based on the company’s legal name, and if yours includes a comma (like “IowaComputerGurus, Inc.”), dotnet tries to split the input into an array instead of treating it as a literal string — even when quoted. This post documents the issue and the hard-won fix.

What you’ll learn

  • Why commas in Apple certificate names cause MSB1006: Property is not valid errors in GitHub Actions
  • How to transfer the certificate name secret into an environment variable instead of injecting it directly
  • The exact BASH escaping syntax needed for the CodesignKey parameter in the publish step
  • A complete working GitHub Actions publish step for .NET MAUI iOS builds with proper quoting

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